Local Shrinkage Compensation Method

Above a description has been given of general characteristics of the method for local application of shrinkage compensation. However, this method can be used to a somewhat varying extent as controlled by a logical variable SBH_LOCAL_SHRINKAGE. Depending on the parameters assigned to this variable the system will act differently. Allowed values are:

EDGES_AND_FILLETS

EDGES

EDGES_BUTTS

1. SBH_LOCAL_SHRINKAGE = EDGES_AND_FILLETS

   By this assignment the system is told to apply the local shrinkage method automatically and to the full extent as described in general terms above. The weld traces of all kinds of connected components, profiles as well as panels (plates), and brackets are considered. So are also the welds along edges, both fillet welds and butt welds. Flanges welded along edges will contribute to the longitudinal shrinkage.

   It is possible to some extent for the user to take manual control of the shrinkage compensation (via input in panel generation) and then the system will automatically switch to case 2, that means, as if SBH_LOCAL_SHRINKAGE=EDGES. This means that the user takes over the full responsibility for the shrinkage compensation in the interior of plates. Thus, it is not possible to combine manual control and automatic evaluation in this case.

2. SBH_LOCAL_SHRINKAGE = EDGES

   The shrinkage compensation along plate edges will be applied locally while the compensation in the interior of the plate will be done according to the "statistical method" as described above (however, without the contribution from the seams). To be compensated for shrinkage an edge must have been supplied with a bevel definition. However, the type of bevel (butt welding or fillet welding) is irrelevant.

3. SBH_LOCAL_SHRINKAGE = EDGES_BUTTS

   Similar to the previous case, butt shrinkage will be applied locally only along edges with bevel types for butt welding, that means, one of the basic types 10, 20, 30, 33, 40, 41, 43, 50 or 51.

   If the user (in cases 2 and 3) has taken control via any of the parameters M5 or M6 in generation input then there will be a complete switch to the statistical method.